I purchased this hearing device for my 93-year-old mother. As soon as we out it on the was amazed how well she could hear! She can now here her great granddaughter chatted away! I would recommend this device to those who have a significant hearing loss as my mother has! Thank you! I also cut one of the tubes too short. I contacted customer service and they sent new tubes. I received them in two days! I am very impressed. I don’t normally write reviews, but I am so impressed with the unit and customer support, I had to submit this review. Thanks to you so very much. My mom is back into the hearing world again!